:root {
    --bg-main: #F5F7FB;
    --bg-card: #FFFFFF;
    --primary: #3B82F6;
    --primary-hover: #2563EB;

    --text-main: #111827;
    --text-body: #374151;
    --text-muted: #6B7280;

    --border-light: #E5E7EB;
    --danger: #EF4444;
}

* {
    box-sizing: border-box;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto;
}

.main-content {
    /* margin: 0; */
    background: var(--bg-main);
    display: flex;
    /* align-items: center; */
    justify-content: center;
    height: 100vh;
}

/* Card */
.register-card {
    width: 420px;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-light);
}

/* Title */
.register-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.register-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* Error Box */
.error-box {
    display: none;
    background: #FEF2F2;
    border: 1px solid #FECACA;
    color: var(--danger);
    font-size: 14px;
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 16px;
}

/* Input */
.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    font-size: 13px;
    color: var(--text-body);
    margin-bottom: 6px;
}

input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    font-size: 14px;
    color: var(--text-body);
    outline: none;
    transition: all .2s ease;
}

input::placeholder {
    color: #9CA3AF;
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* Input Error State */
input.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

/* Button */
.btn-primary {
    width: 100%;
    margin-top: 8px;
    padding: 14px;
    border-radius: 14px;
    border: none;
    background: var(--primary);
    color: white;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: 0.2s ease;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

/* Footer */
.form-footer {
    margin-top: 18px;
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
}

.form-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}